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2023-12-08 01573e231f18eb2d99162747186f59511f56b64d

 kernel/samples/livepatch/livepatch-shadow-mod.c
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@@ -1,18 +1,6 @@
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+// SPDX-License-Identifier: GPL-2.0-or-later
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 /*
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  * Copyright (C) 2017 Joe Lawrence <joe.lawrence@redhat.com>
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of the GNU General Public License
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- * as published by the Free Software Foundation; either version 2
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- * of the License, or (at your option) any later version.
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- *
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- * This program is distributed in the hope that it will be useful,
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- * but WITHOUT ANY WARRANTY; without even the implied warranty of
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- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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- * GNU General Public License for more details.
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- *
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- * You should have received a copy of the GNU General Public License
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- * along with this program; if not, see <http://www.gnu.org/licenses/>.
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  */
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 /*
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@@ -96,18 +84,18 @@
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  * Keep a list of all the dummies so we can clean up any residual ones
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  * on module exit
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  */
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-LIST_HEAD(dummy_list);
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-DEFINE_MUTEX(dummy_list_mutex);
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+static LIST_HEAD(dummy_list);
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+static DEFINE_MUTEX(dummy_list_mutex);
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 struct dummy {
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 	struct list_head list;
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 	unsigned long jiffies_expire;
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 };
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-noinline struct dummy *dummy_alloc(void)
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+static __used noinline struct dummy *dummy_alloc(void)
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 {
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 	struct dummy *d;
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-	void *leak;
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+	int *leak;
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 	d = kzalloc(sizeof(*d), GFP_KERNEL);
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 	if (!d)
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@@ -117,7 +105,7 @@
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 		msecs_to_jiffies(1000 * EXPIRE_PERIOD);
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 	/* Oops, forgot to save leak! */
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-	leak = kzalloc(sizeof(int), GFP_KERNEL);
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+	leak = kzalloc(sizeof(*leak), GFP_KERNEL);
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 	if (!leak) {
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 		kfree(d);
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 		return NULL;
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@@ -129,7 +117,7 @@
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 	return d;
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 }
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-noinline void dummy_free(struct dummy *d)
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+static __used noinline void dummy_free(struct dummy *d)
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 {
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 	pr_info("%s: dummy @ %p, expired = %lx\n",
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 		__func__, d, d->jiffies_expire);
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@@ -137,7 +125,8 @@
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 	kfree(d);
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 }
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-noinline bool dummy_check(struct dummy *d, unsigned long jiffies)
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+static __used noinline bool dummy_check(struct dummy *d,
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+					   unsigned long jiffies)
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 {
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 	return time_after(jiffies, d->jiffies_expire);
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 }